demux: adaptative: always fallback on representation format

modules/demux/adaptative/playlist/BaseAdaptationSet.cpp

@@ -54,7 +54,10 @@ BaseAdaptationSet::~BaseAdaptationSet   ()
 
 StreamFormat BaseAdaptationSet::getStreamFormat() const
 {
-    return StreamFormat();
+    if (!representations.empty())
+        return representations.front()->getStreamFormat();
+    else
+        return StreamFormat();
 }
 
 std::vector<BaseRepresentation*>& BaseAdaptationSet::getRepresentations()

modules/demux/dash/mpd/AdaptationSet.cpp

@@ -43,17 +43,9 @@ AdaptationSet::~AdaptationSet()
 StreamFormat AdaptationSet::getStreamFormat() const
 {
     if(!getMimeType().empty())
-    {
         return DASHStreamFormat::mimeToFormat(getMimeType());
-    }
-    else if (!representations.empty())
-    {
-        return representations.front()->getStreamFormat();
-    }
     else
-    {
-        return StreamFormat();
-    }
+        return BaseAdaptationSet::getStreamFormat();
 }
 
 bool AdaptationSet::getSubsegmentAlignmentFlag() const